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Analysis of long-billed curlew (Numenius americanus) distributions at three spatial scales

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dc.contributor.advisor Colwell, Mark A.
dc.contributor.author Mathis, Ryan L.
dc.date.accessioned 2011-10-26T22:13:05Z
dc.date.available 2011-10-26T22:13:05Z
dc.date.issued 2000-12
dc.identifier.uri http://hdl.handle.net/2148/830
dc.description Thesis (M.S.)--Humboldt State University, Wildlife Management, 2000 en_US
dc.description.abstract I examined the low tide spatial distributions (uniform, random, aggregated) of Long-billed Curlews (Numenius americanus) at three spatial scales, within individual home ranges (< 8 ha), within an estuary (< 50 ha), and across Humboldt Bay (< 5000 ha). For eight individual curlews, space use differed in home range size (1.3 — 7.5 ha) and distance moved over 2-hrs (1.1 — 2.8 kin). Spatial distribution of curlew locations within home ranges (recorded at 2-min intervals) was predominantly (74%) even. Distributions of curlew locations within smaller home ranges were more even than curlews using larger home ranges. Within the Elk River Estuary, number of curlews using intertidal habitats (May 1999 — April 2000) at low tide 0.3 m) ranged from 1 — 20. Dispersion patterns of curlews in the estuary were most often (73%) uniform during summer surveys and were significantly and inversely related to curlew abundance. Across Humboldt Bay, curlews using intertidal habitats at low tide concentrated in certain areas producing significantly aggregated distributions on six occasions. Number of curlews present ranged from 168 — 301. Variations in distributions across spatial scales were possibly a response to variations in food distribution. Recognizing a species' spatial distribution is the first step in understanding a species' ecology and can be used to predict effects of potential habitat loss. en_US
dc.language.iso en_US en_US
dc.publisher Humboldt State University en_US
dc.subject Numenius americanus en_US
dc.subject Humboldt Bay, California en_US
dc.subject Elk River Estuary, California en_US
dc.subject Long-billed curlews en_US
dc.title Analysis of long-billed curlew (Numenius americanus) distributions at three spatial scales en_US
dc.type Thesis en_US
dc.description.program Wildlife Management en_US

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